Penda was a son of
Pybba of Mercia and said to be an
Icling, with a lineage purportedly extending back to
Wōden. The
Anglo-Saxon Chronicle gives his descent as follows: Penda was Pybba's offspring, Pybba was
Cryda's offspring, Cryda Cynewald's offspring, Cynewald Cnebba's offspring, Cnebba Icel's offspring, Icel Eomer's offspring, Eomer
Angeltheow's offspring, Angeltheow
Offa's offspring, Offa
Wermund's offspring, Wermund
Wihtlæg's offspring, Wihtlæg Woden's offspring. The
Historia Brittonum says that Pybba had 12 sons, including Penda, but that Penda and
Eowa of Mercia were those best known to its author. (Many of these 12 sons of Pybba may merely represent later attempts to claim descent from him.) Besides Eowa, the pedigrees also give Penda a brother named Coenwalh from whom two later kings were said to descend, although this may instead represent his brother-in-law
Cenwalh of Wessex. The time at which Penda became king is uncertain, as are the circumstances. Another Mercian king,
Cearl, is mentioned by
Bede as ruling at the same time as the Northumbrian king
Æthelfrith, in the early part of the 7th century. Whether Penda immediately succeeded Cearl is unknown, and it is also unclear whether they were related, and if so how closely;
Henry of Huntingdon, writing in the 12th century, claimed that Cearl was a kinsman of Pybba. It is also possible that Cearl and Penda were dynastic rivals. According to the
Anglo-Saxon Chronicle, Penda became king in 626, ruled for 30 years, and was 50 years old at the time of his accession. since the same source says he died in 655, which would not correspond to the year given for the beginning of his reign unless he died in the thirtieth year of his reign. Furthermore, that Penda was truly 50 years old at the beginning of his reign is generally doubted by historians, mainly because of the ages of his children. The idea that Penda, at about 80 years of age, would have left behind children who were still young (his son
Wulfhere was still just a youth three years after Penda's death, according to Bede) has been widely considered implausible. The possibility has been suggested that the
Chronicle actually meant to say that Penda was 50 years old at the time of his death, and therefore about 20 in 626. around the year 600. Bede, in his
Historia ecclesiastica gentis Anglorum, says of Penda that he was "a most warlike man of the royal race of the Mercians" and that, following
Edwin of Northumbria's defeat in 633 (
see below), he ruled the Mercians for 22 years with varying fortune. The noted 20th-century historian
Frank Stenton was of the opinion that the language used by Bede "leaves no doubt that ... Penda, though descended from the royal family of the Mercians, only became their king after Edwin's defeat". The
Historia Brittonum accords Penda a reign of only ten years, perhaps dating it from the time of the Battle of Maserfield (
see below) around 642, although according to the generally accepted chronology this would still be more than ten years. If he was not yet king, then his involvement in this conflict might indicate that he was fighting as an independent
warlord during this period—as Stenton put it, "a landless noble of the Mercian royal house fighting for his own hand." On the other hand, he might have been one of multiple rulers among the Mercians at the time, ruling only a part of their territory. The
Chronicle says that after the battle, Penda and the West Saxons "came to an agreement." It has been speculated that this agreement marked a victory for Penda, ceding to him Cirencester and the areas along the lower
River Severn. and the territory eventually became part of the subkingdom of the
Hwicce. Given Penda's role in the area at this time and his apparent success there, it has been argued that the subkingdom of the Hwicce was established by him; evidence to support this is lacking, although the subkingdom is known to have existed later in the century. == Alliance with Cadwallon and the Battle of Hatfield Chase ==